public async Task <List <LectureInfoDto> > GetStudentLectures(int userId)
{
List <LectureInfoDto> lectureInfos = new List <LectureInfoDto>();
List <UserLecture> userLectures = await _userLectureRepository.GetStudentLecturesByUserId(userId);
foreach (UserLecture userLecture in userLectures)
{
Lecture lecture = await _lectureRepository.GetLectureByCode(userLecture.lecture_code);
User instructor = await _userRepository.GetUserById(lecture.instructor_id);
if (lecture == null || instructor == null)
{
continue;
}
lectureInfos.Add(new LectureInfoDto(lecture, instructor));
}
return(lectureInfos);
}